Excited QCD 2016

Session

Friday Afternoon

11 Mar 2016, 16:30

Costa da Caparica, Portugal

Conveners

Friday Afternoon

• Michal Praszalowicz (Jagiellonian University, Krakow)

113. An attempt of a determination of mass-differences $m_{K_L}-m_{K_S}$ and $m_{K_2}-m_{K_1}$ from CPLEAR data on semileptonic decay of $K^0$ and $\bar K^0$

Stanislav Dubnicka (Institute of Physics)

11/03/2016, 16:30

In an investigation of the decays and oscillations of neutral $K$-mesons two types of neutral particles have been introduced. The $K_1^0$, $K_2^0$ with well defined CP-parity and $K_S^0$, $K_L^0$ respecting the experimental fact of CP violation in weak decays of neutral $K$ -mesons, whereby only particles $K_S^0$, $K_L^0$ are explicitly presented in Rev.Part.Physics. Despite of this fact one...

100. Computing the topological susceptibility from fixed topology QCD simulations

Arthur Dromard (Goethe University)

11/03/2016, 17:00

The topological susceptibility is a very important quantity in QCD, which can be computed using lattice methods. However, at fine lattice spacing, or when using high quality chirally symmetric quarks, typical simulation algorithms tend to become stuck in a single topological sector. In such cases the computation of the topological susceptibility is not anymore straightforward. Here we...

109. Heavy-light mesons in Minkowski space

Sofia Leitão (CFTP, IST Lisbon)

11/03/2016, 17:30

We present a study of the heavy-light pseudoscalar and vector meson masses, using a covariant formalism based on the Covariant Spectator Theory (CST). Derived directly in Minkowski space, our approach approximates the Bethe-Salpeter equation, effectively taking into account the contributions of both ladder and crossed ladder diagrams in the kernel. Our goal was to provide—without already...

83. Chiral-symmetry breaking and pion structure in the Covariant Spectator Theory

Dr Elmar P. Biernat (Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico (IST), Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal)

11/03/2016, 18:30

We introduce a covariant approach in Minkowski space for the description of quarks and mesons that exhibits both chiral-symmetry breaking and confinement. Our interaction kernel in momentum space is the sum of a $\delta$-function potential and a covariant generalization of the linear confining interaction. We assume a Lorentz vector structure for the $\delta$- function and a mixed...

98. Unquenching the meson spectrum: a model study of excited rho resonances

Dr George Rupp (CeFEMA/IST, Univ. of Lisbon)

11/03/2016, 19:00

Recent lattice results indicate that including meson-meson interpolating fields in unquenched calculations of the light-meson spectrum may give rise to huge relative mass shifts as compared to similar computations with only quark-antiquark degrees of freedom. I this talk I shall focus on the rho meson and its radial excitations, in the context of a unitarised quark model with...